Method of forming frozen spheres in a force-free drop tower

Details Method of forming frozen spheres in a force-free drop tower Method of forming frozen spheres in a force-free drop tower

1980-12-24

1982-02-02

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

Self-supporting particle making

65 22, 65142, 264 5, 425 6, C03B 1910

Patent

active

043137458

ABSTRACT:
A method of forming hollow glass spheres S shaped by the effects of surface tension acting on bubbles of glass in its molten state; the method is characterized by the steps of establishing a downwardly flowing stream of air accelerated at a one-G rate of acceleration through a drop tower 10, introducing into the stream of air free-falling bubbles B of molten glass, and freezing the bubbles in the stream as they are accelerated at a one-G rate of acceleration.

REFERENCES:
patent: 2738548 (1956-03-01), Kassel
patent: 3059280 (1962-10-01), Laehder
patent: 3133805 (1964-05-01), Robinson
patent: 3331898 (1967-07-01), Haas et al.
patent: 4058386 (1977-11-01), Faulkner
patent: 4190622 (1980-02-01), Landis
patent: 4279632 (1981-07-01), Wang et al.
Controlling the Shape of Glass Microbaloons, NASA Tech. Briefs, vol. 5, #2, p. 236, Summer 1980.

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